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Providing evidence to improve practice

Individual study: Predator removal increased mallard Anas platyrhynchos duckling survival across four prairie sites in southern Canada

Published source details

Pearse A.T. & Ratti J.T. (2004) Effects of Predator Removal on Mallard Duckling Survival. The Journal of Wildlife Management, 68, 342-350


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Control predators not on islands for wildfowl Bird Conservation

A replicated study in southern Saskatchewan, Canada, in 2000-1 (Pearse & Ratti 2004), found that survival rates of mallard Anas platyrhynchos ducklings was 41-50% higher in four 41km2 grassland-wetland sites where predators were removed (average survival rate of 59% for 686 ducklings from 78 broods), compared with four sites without predator removal (40% survival). Survival was measured until 30 days old, with a total of 686 ducklings from 78 broods studied. A total of 509 predators were removed: red foxes Vulpes vulpes, striped skunks Mephitis mephitis, raccoons Procyon lotor, coyotes Canis latrans, American badgers Taxidea taxus and American mink Neovison vison.